Derivatization of celluloses isolated from different sources

• Grant number: 98/14814-8
• Support Opportunities: Regular Research Grants
• Start date: March 01, 1999
• End date: February 28, 2001
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Elisabete Frollini
• Grantee: Elisabete Frollini
• Host Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

The intention in this work is to subject celluloses obtained from different sources to an atmosphere of ionized air, in order to evaluate if this treatment has any influence on the process of solubilization and derivatization of these substances. These macromolecules will be evaluated as to the degree of crystallinity, molar mass, sweeping electronic microscopy, and inverse phase gas chromatography. Using celluloses that have and have not been subjected to ionized air, it is intended to synthesize acetates of cellulose with diversified degrees of substitution, in homogeneous and heterogeneous media, which will be characterized as to the degree of substitution, uniformity of substitution, thermal stability, average molar mass and distribution of molar mass. (AU)